The ixo protocol defines a new open standard for producing verifiable claims about changes in the state of the world. Which are the basis for impact creators to mint non-fungible (NFT) Impact Tokens.Sustainable Decentralised Finance (Sustainable DeFi) and Impact Verification applications built on the Internet of Impact have the potential to fundamentally change the state of the world. By transforming how we finance, implement, measure, value and create markets for sustainable impact. Which is relevant to all forms of capital flowing into social, environmental and economic development, as well as Climate Finance and Carbon markets.